October 27, 2021 8:06 am CHICAGO'S FORECAST: Partly Sunny & Seasonal Today NBC 5’s Alicia Roman has the details Local 1:53 What is a geomagnetic storm and how does it cause the Northern Lights? Here's what to know 2:13 Chicago Forecast: Great Mother's Day weekend weather 1:53 Solar storm produces breathtaking Northern Lights display 1:52 A ‘severe' geomagnetic storm is hitting Earth. NBC 5 Storm Team explains the significance 1:15 CHICAGO FORECAST: Cloudy skies, rain expected overnight ahead of mild Saturday